Hi StYe_4738936 ,
Q) Hi, how many of the BLE of CYW43012 can be connected?
If you are asking about maximum no:of BLE simultaneous connection with CYW43012, then it depends on the memory constraints.
We have tested and verified for max 7 simultaneous connections .
Q) CyBlueTool to test BLE of CYW43012 , is there a firmware for downloaded to do the test?
You may have to download the bt_mfg test available in WICED SDK to work with CyBluetool : /43xxx_Wi-Fi/apps/test/bt_mfg_test
CyBluetool user guide : CyBluetool User's Guide
If you are using embedded application, we have several examples available in WICED SDK as well like ble_hello_sensor ,ble_hello_client etc.